diff --git a/test/netstd/Server/TestServer.cs b/test/netstd/Server/TestServer.cs
index fdbaa97..a540d19 100644
--- a/test/netstd/Server/TestServer.cs
+++ b/test/netstd/Server/TestServer.cs
@@ -606,7 +606,7 @@
                             trans = new TTlsServerSocketTransport(param.port, Configuration,
                                 cert,
                                 (sender, certificate, chain, errors) => true,
-                                null, SslProtocols.Tls12);
+                                null);
                             break;
 
                         case TransportChoice.Socket: